bloomberg view," msnbc political analyst. new book "center holds obama and his enemies" is out june 4th. some believe the boston marathon bombing means de facto we should pause, slow down the process of immigration reform. john mccain calls that ludicrous. what do you think? >> i'm with john mccain on this one. i mean, this is almost pathetic kind of excuse. what does it have to do with a mexican living in the united states who has done everything right and wants their kids to be able to get ahead in american life? what is this incident in boston have to do -- >> the argument is these are two individuals who emigrated from dagestan, from chechnya, came here, and ended up wreaking havoc. >> so what the critics don't get is that what the immigration bill would do, if you actually look at where they are in their preparation of it, is it would strengthen our immigration laws and make it harder for bad guys to get in by modernizing our immigration system. so people who say that, you know, this is an argument against immigration reform, even if they're in the united states senate, simply don'